Lsa-012 Heavy-Duty Waterproof Door Limit Switch for Tower Crane Industrial Travel Switch

• Customization: Available
• Structure: Working Limit Switch
• Type: Explosion-Proof Limit Switch
• Model NO.: LSA-012
• Certification: RoHS, CE, ISO, CCC
• Switching Element: Speed Switch
• Application: Mining
• Contactless Type: Reed Switch
• Contact: Contact
• Max. Current: 10A
• Operation Speed: 0.5mm-50cm/Sec
• Max. Voltage: 10A 250VAC, 6A 380VAC
• Material: Intensive Plastic and Zinc Cast
• Degree of Protection: IP66
• Transport Package: Packing by Carton
• Specification: 10pcs/inner box, 100pcs/master box, 19kgs/ctn
• Trademark: ann
• Origin: Wenzhou
• Production Capacity: 50000PCS/Year
• Package Size: 14.50cm * 7.00cm * 4.00cm
• Package Gross Weight: 0.250kg
• Lead Time: 5 days (1 - 500 Pieces) ; To be negotiated ( > 500 Pieces)

Product Description

ANNELE LSA-012 heavy-duty waterproof double circuit door limit switch. Double circuit 1NO+1NC contacts, sealed waterproof housing, robust mechanical structure. Specially engineered for tower crane safety door interlock, position detection and stroke protection. CE certified

ANNELE LSA-012 is a heavy-duty waterproof travel limit switch with double circuit contact design. It is widely used as safety door interlock switch for tower cranes. When the tower crane access door is opened, the switch sends dual signals to cut off power supply and prevent accidental startup, protecting operators on construction sites.

The fully sealed waterproof metal housing can resist rain splash, dust and vibration in outdoor construction environments. Double circuit contacts provide redundant signal feedback, improving safety reliability for lifting equipment. The solid mechanical structure can withstand frequent mechanical actuation for long service life.

Wide Application Range: Tower crane safety door interlock and position monitoring Construction hoists, lifting platforms and material elevators Outdoor heavy machinery, port lifting and handling equipment CNC machine tools and heavy-duty automated assembly lines Conveyor systems, mining auxiliary equipment Hydraulic & pneumatic heavy equipment safety protection Industrial cabinet safety door interlock and stroke limit control

 

 

Double break	INO+INC Force Break snap action
Rated voltage/current	10(4)A, 125, 250VAC/6(2), 380VAC For inductance Load, Cos∅=0.4
Contact resistance	25mΩ max. (initial value)
Insulation resistance	100mΩ min.(at 500VDC)
Dielectric strength	1000VAC, 50/60Hz for 1 minute between terminals of the same polarity
	1500VAC, 50/60Hz for 1 minute between current-carrying and non-current-carrying metal parts
	1500VAC, 50/60Hz for 1 minute between each terminal and ground
Electrical endurance	500,000 at 10A 250VAC Resistive
Mechanical life	10,000,000 operations min.(under rated conditions)
Operation speed	5mm/s to 0.5m/s
Waterproof and dust-proof	IP66
Rising temperature	Max 30 ºC over ambient temperature at rated voltage/current
Standard	EN50041, EN50047, IEC337-1,VDE0660
Operation temperature	-5 ºC - 65 ºC (with no icing)
Storage temperature	-5 ºC- 65 ºC(with no icing)
Humidity	95% RH Max.
Shock	Mechanical durable: 1000m/square s min.
	Malfunction:300m/ S2 min.
Vibration frequency	Malfunction: 10 to 55Hz 1.5mm double amplitude
Torque of terminal screw	6-8 kgf-cm
Torque of other screw	Cover 12-14 kgf-cm/Head 8-9 kgf-cm/Mounting 50-60 kgf/cm
Bare cooper wire spec.	∅2 Max.
Cable Spec.	∅12 Max. (IP65 if use ∅8-9)

 

Product Parameters

• Double circuit SPDT 1NO+1NC contacts, dual independent signal output for safety monitoring
• Heavy-duty reinforced metal housing, excellent mechanical strength and impact resistance
• Waterproof sealed construction, works reliably in outdoor, rainy and dusty construction sites
• Safety door interlock function, cuts off power or triggers alarm once the door opens
• Strong anti-vibration performance, adapts to continuous vibration of tower crane operation
• CE certified, designed for tower crane and other outdoor heavy construction machinery

Model	LSA	LSA-001	LSA-003	LSA-012	LSA-021
Operationg force	OF(Max.)	800g	800g	800g	400g-cm
Release force	RF(Min.)	400g	400g	400g	100g-cm
Pre-travel	PT(Max.)	1.8mm	1.8mm	1.8mm	20degree
Tripping position	TP±10%	2.0mm	2.0mm	2.0mm	22.5°
Movement differential	MD(Max.)	1.2mm	1.2mm	1.2mm	10°
Over travel	OT(Min.)	4.0mm	4.0mm	4.0mm	75°
Total travel	TT(Min.)	5.8mm	5.8mm	5.8mm	95°
Rotary indexing					22.5°

 

Model	LSA	LSA-031	LSA-061	LSA-071	LSA-081
Operationg force	OF(Max.)	400g-cm	150g	150g	150g
Release force	RF(Min.)	100g-cm	50g	50g	50g
Pre-travel	PT(Max.)	20°	20°	30mm	30mm
Tripping position	TP±10%	22.5°	22.5°	22.5°	22.5°
Movement differential	MD(Max.)	10°	14°	14°	14°
Over travel	OT(Min.)	75°	20mm	20mm	20mm
Total travel	TT(Min.)	95°	50mm	50mm	50mm
Rotary indexing		22.5°

 

Dimension

 

Detailed Photos

 

 

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 Contact Form & Mounting Hole Dimensions:

Application